Oh, and George has another clue for us all, for a role that’s obviously Hodor:

“He doesn’t have a lot to say, but he says it a lot. He’s not a muslim, not a pagan, not a scientologist, but he might be a town in Scotland.”

Have to agree with Halfhand on this, this is Kristian Nairn, whom we reported on back in May. The first clue identifies the role—Hodor—and the second identifies his name (neither Muslim, nor Pagan, nor Scientologist ... but “Christian”), and the last identifies his last name (Nairn being a Scottish town). He looked like an excellent choice. A shame his audition video is no longer available, but do note our linked post above, where his agent—the one who recorded and posted the video—comments.